Wrench.



PATEN-TED JUNE 2, 190:8. M.*E. -LAYNE & S. N. 'HALIMy WRENCH.

APPLIoATIoN FILED was. 1907.

2 SHEETS-'SHEET l.

' I myNToRS ru: Nomar: PIJ-:2 5 co., WASHINGTON. n. c.

No. 889,244. PATENTED JUNE 2, 1908.

M. E. LAY-'NE &1S. N. HALL. WRENCH.

APPLICATION FILED DBG. 3, `1 907.

- 2 SHEETS-SHEET 2.

UNITED sTATEs PATENT oEEroE.

MAHLON E. LAYNE AND SAMUEL N. HALL, OF HOUSTON, TEXAS.

WRENCH.

Specification of Letters Patent.

Patented June 2, 1908.

To all 'whom it may concern:

Be it known that we, MAHLON E. LAYNE and SAMUEL N. HALL, citizens of theUnited Aparticularly to pipe wrenches of the chain type. -The inventionhas for its primary 0bject; the provision of an improved and simpliiiedform of double acting or reversible wrench wherein the jaws employed areinterchangeable and reversible and wherein the number of different partsis reduced to a minimum. One form of the inventionis illustrated in theaccompanying drawings, where- 111:-

Figure 1 is a side elevation of the operative parts of the wrench asapplied to a pipe, the position of the parts when the turning isreversed being shown in dotted lines, and one jaw plate being removed,

Figure 2 is a perspective view of the end of the handle to which the jawplates are to be secured,

Figure 3 is a perspective view of one of the jaw plates, and

Figure 4 is a transverse section through a jaw plate on the line 4 4 ofFigure 3.

Certain ofthe general features of construction are shown in patent toSamuel N. Hall No 818,371, and the pending application of Samuel N.Hall, Serial No. 328,497. rl`he invention in this case relating toimprovements in construction over these prior structures to whichattention will be particularly directed.

The handle 1 of the wrench is bent at its front end as indicated inFigures 1 and 2, and is provided with a bolt-hole 2 fory receiving theclamping-bolt. This end is provided on either side with the upstandingtongue 3, and lthe upper edge is cut awayat 4 for the passage of thechain when the parts are in the position shown in Figure 1. A lug 5 isprovided at the bend in the handle for the permanent attachment of oneend of the chain. 6 are the jaw-plates, two of which are provided, oneon either side of the handle, and these plates are held rigidly in theposition indicated in Figure 1 by means of a bolt passing through theholes 7 in the plates and the hole 2 in the handle, and also by means ofthe engagement ofthe grooves 8 with the tongue portions 3 of the handle.Each side of each of the jaw-plates is also provided with a hook member9 as indicated in Figure 3, the purpose of which hook is to engage withthe ends of the pintle pins 10 of the chain 11, which pintle-pinsproject out past the side plates in the manner common to this type ofkgrip chains. lt will be understood that When the parts are in theposition of Figure 1, one end of the pintle 10 engages one of the hooks9 on one of the j aw-plates, while the other end of such pintle engagesthe hook 9 on the opposing jaw-plate. The jawplates are provided withthe opposing sets of teeth 12 and 13 in order to permit of the doubleaction of the device, and there is a central recess portion 14 to permitof the movement of the pipe from one set of teeth to the other setwithout unhooking the chain from the hooks 9, and to permit of theslacking of the chain when it is desired to remove the pintle 10 fromthe hooks 9. lt will be noted that the jaw-plate 8 is symmetrical onboth sides of vthe center line 4-4, and that there are two rooves 8 8,which construction permits o the transposition of the jawplates from oneside of the handle to the other. In other words, the jaw-plates onopposite sides of the handle are exactly alike, and the number ofdifferent parts necessary to complete the wrench are thereby reduced, itbeing possible to forge all of the jaw-plates from one set of dies. Itwill be seen that this feature of reversibility is made possible by thefact that the end of the chain which is permanently fastened is securedto the handle instead of to the jaw as has been the practice in theprior device heretofore referred to. It is obvious that if the permanentattachment were made to the jaw-plates it would be impossible to reversesuch plates from one side of the device to the other. The end of thehandle to which the jaw-plate is secured is of such a thickness that thejaw-plates are spaced apart a distance suflicient to receive t egrip-chain 11, and permit of the free passage of its extended pintles10.

Having thus described our invention and illustrated its use, what Weclaim as new and desire to secure by Letters Patent is the following 1.In combination in a Wrench, a pair of similar and interchangeablejaw-plates secured to opposite sides of the end of the handle and eachprovided with two sets of o positely acting teeth onthe same side o thejaw plate and having chain engaging means,

and a chain anchored to the handle adjacent the jaw-plates and adaptedto be engaged by the chain engaging means of the j avv-plates.

.2. In combination in a Wrench, a pair of similar an'd interchangeable jaW- lates secured to opposite sides of the end o the handleand eachprovided With tWo sets of' o positely acting teeth on the same side olIpthe jaw plate and having chain engaging means, and a chain ermanentlysecured at one end to the handige adjacent the jaw-plates and adapted tobe engaged by the chain engaging means of the jaw-plates.

3. In combination in a Wrench, a pair of similar and interchangeablejaw-plates each having two sets of teeth and a pair of intersectingslots on its inner face to it the handle and permit of a change from oneside thereof to the other, means for detachably clamping the atv-platesin position on opposite sides of the handle and a chain gripv forcooperating with the jaw-plates.

4. In combination in a Wrench, a pair of similar and interchangeablejaw-plates each having tWo sets of teeth and a pair of intersectingslots on its inner face to fit the handle and permit of a change fromone side thereof to the other, means for detachably clamping theaW-plates in position on opposite sides of the handle and a grip chainsecured at one end to the handle and adapted to form a loop and bedetachably hooked to either side of the jaw-plates.

5. In a double acting pipe Wrench, the combination With a handle andgrip chain, of a jaw plate comprising a segmental plate provided with apair of intersecting grooves on its inner face, a pair of hooks onopposite sides of the plate-and tWo sets of teeth, the arrangement ofgrooves, teeth, and hooks being symmetrical on opposite sides of thecenter line of the plate whereby it is capable of reversal.

6. The combination with a Wrench handle having its end bent at an angleand provided with a perforated strengthening lug at the concave portionof the bend, of a pair of jaw plates on opposite sides of the bent end,and a grip chain secured to the said perforated lug.

In testimony whereof We have hereunto signed our names in the presenceof the two subscribed Witnesses.

MAHLON E. LAYNE. SAMUEL N. HALL.

IVitnesses:

` W. H. REEVES, R. E. GARRETT.

